Loom.



W. A. BROWN.

LOOM. APPLICATION F'ILED JAN-2,1917. 1,262,91 81 Patented Apr. 16, 1918.

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ATTORNEY W. A. BROWN.

LOOM. I APPLICATION FILED JAN. 2,1917.

Patented Apr. 16, 1918.

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WALTER A. BROWN, 0]? EASLEY, SOUTH CAROLINA.

LOOM.

Specification of Letters Patent.

Patented Apr. 16, 1918.

Application filed January 2, 1917. Serial No. 140,253.

To aZZw/iom it may concern:

Be it known that I, WALTER A. BROWN, a citizen of the United States,residing at Easley, in the county of Pickens and State of South Carolina, have invented certain new and useful Improvements in Looms, of which the following is a specification.

This invention has relation to looms for weaving cloth, and the nature and objects thereof will be readily apparent to those skilled in the art to which it appertains in the light of the following explanation of the accompanying drawings illustrating what I now believe to be the preferred embodiment, or mechanical expression of my invention, from among other forms and arrangements within the spirit thereof or the scope of the appended claims.

However, an object of the invention is to provide in a loom of the Northrop type, means whereby the operation of the loom may be automatically stopped when any portion of the harness of the loom or oper ating mechanism therefor, becomes broken.

Another object of the invention is to provide a device in a loom having a warp thread stop motion for coaction with said stop motion to automatically stop the loom when any portion of the harness, frame, or operating mechanism therefor becomes broken or out of order.

A still further object of the invention is to provide a device of the character above set forth, of a nature permitting its ready attachment and embodiment in many types of looms, and particularly those employing a warp stop motion of the character including elements supported upon the warp threads and adapted when said threads are broken to permit the same to obstruct movement of a particular piece of mechanism whereby operation of associating mechanism may take place to shut off the applica tion of power to the loom.

In addition to the foregoing my invention comprehends improvements in the details of construction and arrangement of parts to be hereinafter more fully described and particularly set forth in the appended claims.

In the accompanying drawings in which similar and corresponding parts are designated by the same characters of reference throughout the several views in which they appear;

Figure 1, is a transverse vertical sectional view taken through a loom of the Northrop type and illustrating the embodiment therein of my invention.

Fig. 2, is a view in side elevation of my attachment per 86, and

Fig. 3, is a view of said attachment in edge elevation.

With reference to the drawings 10 indicates the end frame member of aloom of conventional type, and 11 indicates the lay beam mounted for oscillation in a direction transversely of the'loom in a manner usual with looms of conventional type. Mounted upon an extension of the frame and thereabove is a longitudinally extending rock shaft 12 around which straps 13 pass, said straps being designed to support at their lower ends the upper members 14: of harness frames 15 of conventional type. The lower members 16 of said frames are connected through the medium of jack hooks 17 to bottom bars 18, which bars in turn are con nected through the medium of straps 19 to the forward ends of treadles 20 which are mounted for oscillation in a vertical plane upon a shaft 21 secured upon the rear horizontal connecting member of the frame.

Extending between the end members of the frame and in a longitudinal direction is a cam shaft 22 which has fixedly secured thereto cams 23 in spaced relation for engagement with rollers mounted upon the treadles 20 whereby during rotation of said cam shaft the treadles and consequently the harness frames 15 may be alternately moved up and down to change the relation of the warp threads indicated at 2 1. After the usual manner the warp threads are extended transversely of the machine, and through the comb of the lay beam, and rearwardly of the machine are crossed around longitudinally extending lease rods 25.

A loom of the Northrop type embodies an automatic warp stop motion, substantially in the form set forth in Fig. 1 of the drawings wherein 27 indicates one of a series of slotted detectors adapted to be suspended upon the warp threads between the lease rods. A feeler bar 28 is disposed longitudinally of the machine adjacent the lower end of the above mentioned detectors 27, and said bar is mounted upon a plurality of rods 29 fixedly secured to a longitudinally ex tending rock shaft 30 whereby said feeler may be rotated toward and away from the detectors and is adapted for engagement with a coacting bar 31 disposed longitudinally of the machine and in contiguous relation to the feeler bar-28 whereby when any of the detectors drop movement of the feeler bar toward the bar 31 may be prevented. In

this manner any of the detectors will form an obstruction and prevent vibration of said feeler bar. A rock shaft 30 is provided with an arm 32 to which a depending link 33' is connected, the lower end of said link being in turn connected to an arm 34 which is mounted upon a short shaft 35. Said shaft is journaled in the upper end of a link 36 which has a bifurcated portion 37 adapted to partially encircle the cam shaft 22 and formed with an extension provided with bearings wherein said Short shaft 35 is journaled. The link 36 extends forwardly and downwardly from the cam shaft and is connected at its lower end with a lever 38 in turn having engagement with the lower end of a shipper lever 39, which is adapted to move the belts from the fast to the loose pulley of the loom (not shown) when the loom is to be stopped. The cam shaft 22 carries a cam 40 for engaging a follower 11 which is fixedly secured to the above mentioned shaft 35, and said shaft also carries a finger 42 which is adapted to be placed in the path of movement of a lug 43 mounted upon an annular member which encircles and is secured to the cam shaft 22.

In operation, and assuming that one of the detectors has fallen owing to the breaking of the warp thread which supports the same, the feeler bar 28 will be held against vibration and consequently the finger 42 above mentioned will be held in the path of movement of the lug 43 which rotates with the cam shaft whereby upon continued ro,-

tation of the cam shaft during operation of the loom, the link 36 is moved upwardly and longitudinally in the direction of the arrow whereupon the shipper lever will be oscillated in an obvious manner to stop the motion of the loom. Ordinarily and when the warp stop motion is not actuated, the feeler bar 28 is vibrated through the action of the cam 10 which moves the follower 41 thereby rotating the shaft which in turn owing to its connection with the feeler bar vibrates said feeler bar. At such times during the normal operation of the machine as the lug 43 is brought adjacent the finger 42, the cam 40 will operate the, follower 4:1 to move said finger out of the path of movement of said lug whereby the link 36 will not be shifted.

Thus far, the description has been that of the conventional type of loom embodying a warp stop motion, and my invention comprises a vertically extending bar 424: having its lower end bent at right angles as inclicated at 45 for attachment to a transversely extending girthLG. at, the lower. portion of the loom frame through the medium of rivets, bolts, or the like 47. The bar 44: extends upward to all-point. adjacent the rock shaft 30 of the feeler bar, and is disposed in. vertical alinement with the series of detectors 27. A bar 48 is secured to one side face of the bar 44 as clearly set forth, in Fig. 2 wherein it will be seen that the bar 44: is provided with a plurality of elongated openings &9 through which bolts or the like 50 are adapted to pass, said bolts being secured in the upper ends of the bar at. In this manner the bar l8 may be adjusted vertically relative to the bar 14: to vary the height of the mechanism carried by the bar H and to be described. The upper end of the bar 48 is bifurcated to receivea stop lever 51 pivoted at a point substantially intermediate its ends within said bifurcated portion, iaving one end bent upward as at 52 and twisted to dispose its flat face in a plane substantially at right angles to the plane of the lever 51 and having its upper end sharpened as at 53, thereby constituting a finger. The opposite end of the stop lever 51 is connected to a vertically extending link 54: which extends downwardly and is guided in an eye-bolt 55 secured to the lower end of the bar lt. An abutment member 56 is provided in the nature of a strip of sheet metal or the like having a portion 57 disposed parallel to and in contact with the lower end of the link 54 with the upper end of said portion 57 bent at right angles as indicated at 58 and provided with an opening to receive said link 54;,the lower end of said member 57 having a series of perforations 59 through which the bent lower ends of the links 54 may extend, in this manner by disposing the bent terminal of the link 54 in any one of the said openings 59, the abutment member is adjusted longitudinally of the link for a purpose which will be presently obvious. The abutment member is formed at thelower end of the member 57 by bending the metal at right angles to form a horizontal portion 60, extending transversely of the loom, the end of said portion 60 being subsequently bent to extend longitudinally of the loom, and in a position to be disposed beneath the treadles 20 as shown in Fig. 2.

The device of my invention is disposed in such a position as to have its abutment memboibeneath the treadles 20 and the finger of the stop lever 51 disposed adjacent the feeler bar and its coacting bar 31 but normally out of the path of movement of said feeler bar.

In operation, should an accident occur to any portion of the harness of the loom, for instance should one of the jacks 17 break the bottom bar 18 thereof will become disconnected whereupon one or both of the treadles 20 will. be unsupported whereupon said treadle or treadles will fall until they become engaged upon the portion 61"of' the abutment member 56. Owing to such engagement the abutment member will be moved downward thereby drawing upon the link 54 which in turn rocks the lever 51 about its fulcrum point to dispose the finger thereof in the path of movement of the feeler bar 28 thereby preventing vibration or movement thereof in engagement with the coacting bar 31. In view of the foregoing description of the warp stop motion, such interposition of the finger in the path of movement of the feeler bar 28 will have the same effect upon the warp stop motion as if one of the detectors 27 had dropped. Therefore, the further operation of the loom will be immediately stopped.

Thus it will be seen that I have provided a simple and novel device which will automatically stop further operation of looms when an accident occurs to any part of its harness, heddles, or treadles in a rapid and positive manner and furthermore while I have illustrated the device in connection with. a warp stop motion of the character used 011 the Northrop and other looms, it will be obvious that the device may be used in connection with other forms of warp stop motion.

While I have illustrated and described my invention with some degree of particularity I realize that in practice various alterations thereover may be made, and I therefore, reserve the right and privilege of changing the form of the details of con struction or otherwise altering the arrangement of the correlated parts without departing from the spirit of the invention or the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A loom stopping device including a support adapted to be secured to a portion of a loom frame, a stop lever pivoted upon the upper end of said support, a finger formed upon said lever, and adapted to be moved into the path of movement of the feeler of the warp stop motion of the loom, a link depending from the opposite end of said lever, and slidable in said support, resilient means for normally retaining the finger out of the path of movement of the feeler bar, an abutment member adjustably connected to the lower end of the link for disposition beneath the treadles of the loom whereby they may be engaged thereby when a portion of the harness of the loom breaks and means on the support engageable by the abutment member to limit movement of the finger under tension of the spring.

2. A loom stopping device including a vertically extending bar forming a support and adapted to be secured to a portion of a loom frame, a bar secured to the upper end of said bar, and adapted for ad uStment vertically, a stop lever fulcrumed upon said second mentioned bar, a finger formed on one end of said lever adapted for movement in the path of movement of the feeler bar of the warp-stop motion of the loom, resilient means for normally retaining the finger out of such position, a link depending from the opposite end of the lever and slidable in said support, an abutment member secured to the lower end of the link having means for permitting adjustment of said abutment member relative to the link in a vertical direction, and means on the support engageable by the abutment member to limit movement of the stop lever under tension of the spring, said abutment member being adapted to be disposed beneath the treadles of the loom whereby they may be engaged by said treadles when any portion of the harness mechanism breaks.

3. A loom stopping device including a vertical bar forming a support, a pair of vertically spaced rivets on the upper end thereof, a bar having a pair of vertically elongated openings to receive the rivets whereby the second bar may be adjusted vertically relative to the first, a lever pivoted at a pointintermediate its ends upon the upper end of the second mentioned bar, one end of the said lever being turned up and formed into a finger, a spring secured at one end to the finger end of the lever, and the other end to the first bar, an eye bolt extending laterally from the lower end of the first mentioned bar, a rod pivotally connected at its upper end to the end of the lever opposite that end bearing the finger with the lower end of the rod extending through the eyebolt, and having slidable engagement therewith and a plate having one end apertured and bent at right angles to receive the lower end of the rod, and to abut against the eye-bolts to limit movement of the lever under tension of the spring, the lower end of the rod being bent at right angles, said plate having a plurality of vertically spaced openings to receive said bent end of the bar, and a lateral extension on the lower end of said plate to be engaged by the treadles of the loom.

In testimony whereof I afiix my signature in presence of two witnesses.

WALTER A. BROWN.

Witnesses S. W. THORNTON, K. Z. WHITMIRE.-

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of IPatents, Washington. D. G. 

